57345781 has 8 divisors (see below), whose sum is σ = 61649280. Its totient is φ = 53170848.

The previous prime is 57345767. The next prime is 57345787. The reversal of 57345781 is 18754375.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57345781 - 2¹⁹ = 56821493 is a prime.

It is a super-2 number, since 2×57345781² = 6577077196999922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57345787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31216 + ... + 33001.

It is an arithmetic number, because the mean of its divisors is an integer number (7706160).

Almost surely, 2^57345781 is an apocalyptic number.

It is an amenable number.

57345781 is a deficient number, since it is larger than the sum of its proper divisors (4303499).

57345781 is a wasteful number, since it uses less digits than its factorization.

57345781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64283.

The product of its digits is 117600, while the sum is 40.

The square root of 57345781 is about 7572.6997167457. The cubic root of 57345781 is about 385.6267544731.

The spelling of 57345781 in words is "fifty-seven million, three hundred forty-five thousand, seven hundred eighty-one".